PT-2026-65518 · Owen2345 · Camaleon Cms

Theodosis Paidakis · CVE-2026-66748 · Published 2026-07-28 · Updated 2026-07-28

Mitre

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.

Exploit

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2026-66748

Affected Products

Camaleon Cms

References · 6

• 🔥 https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field · Exploit
• https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-66748 · Security Note
• https://github.com/owen2345/camaleon-cms/pull/1136 · Note
• https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2 · Note
• https://vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field · Note